Rotary flow-path exchanging valve

Details Rotary flow-path exchanging valve Rotary flow-path exchanging valve

1999-08-25

2000-06-20

Fox, John

Fluid handling

Systems

Multi-way valve unit

25112911, F16K 3104

Patent

active

060765534

ABSTRACT:
In a rotary flow-path exchanging valve, the magnetic force generated in a pair of main magnetic pole pieces (66) by energization of an electromagnetic solenoid is acted on a multi-pole magnet (71) of a main valve element accommodated within a valve housing (1) so that the main valve element (3) is rotated to exchange a flow-path. The multi-pole magnet (71) is made of a plastic magnet of plastic material mixed with magnetic powder. The main valve element (3) and multi-pole magnet (71) are integrally formed by multiple molding. A pair of main magnetic pole pieces (66) magnetically connected to one polarity of the electromagnetic solenoid (11) are arranged. A pair of auxiliary magnetic pole pieces (70) connected to the other polarity of the electromagnetic solenoid (11) are arranged at positions out of phase from the magnetic pole pieces by 90.degree.. The pair of auxiliary magnetic poles (70) are opposed to portions of the multi-pole magnet (71) having a reverse polarity to that of portions of the multi-pole magnet (71) opposite to the main magnetic poles (66).

REFERENCES:
patent: 2693930 (1954-11-01), Carter
patent: 5280806 (1994-01-01), Glazebrook
patent: 5690144 (1997-11-01), Takahashi

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